19782437402 has 128 divisors (see below), whose sum is σ = 39629979648. Its totient is φ = 7190726400.

The previous prime is 19782437399. The next prime is 19782437407. The reversal of 19782437402 is 20473428791.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19782437407) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20372777 + ... + 20373747.

It is an arithmetic number, because the mean of its divisors is an integer number (309609216).

Almost surely, 2^19782437402 is an apocalyptic number.

19782437402 is an abundant number, since it is smaller than the sum of its proper divisors (19847542246).

19782437402 is a wasteful number, since it uses less digits than its factorization.

19782437402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 19782437402 in words is "nineteen billion, seven hundred eighty-two million, four hundred thirty-seven thousand, four hundred two".